It seems another game that is affected by deindexing are Didnapper 2 as well as Bonds (both are paid games) where they no longer show up on search regardless of the "Show content marked as adult in search & browse" setting.
https://didgames.itch.io/didnapper-2 (RPG Maker MV game focusing on bondage themes)
https://didgames.itch.io/bonds (Bondage themed visual novel)